A question I am often asked is how to correct mistakes on a manual typewriter. There are a few options available today that work very well. I've used them all at one time or another.
First, simply "x" through the mistake. For much of the writing done on manual machines, this is a perfectly acceptable solution when that pinky strays to the wrong key. Plus, it gives your writing some character. Embrace the typos!
Another option is to use Bic Wite-Out Correction Tape (or a generic brand of the same item). When you make a typing mistake, roll up the paper so you can easily get to it, apply a piece of correction tape over the mistake and you're good to go.
One last option would be to use old-time correction tabs. With these, you simply place them over the character you'd like to remove and retype with the correct character. A white coating covers up the mistake. I remember using these in my high school typing class!
Whatever you use, please avoid liquid correction fluid and "correctable" nylon typewriter ribbons. Both make a mess in vintage machines which may cause your local typewriter repair person to curse under their breath.
Do you use another method that I didn't mention? Share your experiences in the comments below.